Concrete-form.



W. M. SMITH.

CONCRETE FORM.

APPLICATION FILED V1ULY25, 1914.

Patented. Apr. 13, 1915.

2 SHEETS-SHEET 1.

THE NORRIS PETERS co, FHOTE-LITHKL, WASHINGTON. D v,

W. M. SMITH.

CONCRETE FORM.

. APPLICATION FILEI? JULY25, 1914. mwmmw Patented Apru13,.1915.

2 SHEETS-SHEET 2.

Snow/whom Wild/WW0,

THE NORRIS PETERS 60., PHOT0-LITHO.. WASHINGTON. D. C4

CONCRETE-FORM.

messes.

Specification of Letters Patent.

Patented Apr. 13,1915.

Application filed July 25, 1914. Serial No. 853,106.

To all whom it may concern:

Be it known that 1, WILLIAM M. SMITH, a citizen of the United States,residing at l/Voodward, in the county of Woodward and State of Oklahoma,have invented new and useful Improvements in Concrete-Forms, of whichthe following is a specification.

The invention relates to adjustable forms, and more particularly to theclass of concrete forms.

The primary object of the invention is the provision of a form whereinthe sections thereof are linked together so that the same may beadjusted relative to each other whereby the form can be used in buildingculverts, conduits, hollow tiles, cave tops, or the like.

Another object of the invention is the provision of a form of thischaracter wherein the sections thereof are reinforced to strengthen thesame and increase the rigidity thereof, yet the said sections can bereadily adjusted relative to each other to give the proper formation tothe structure in the course of construction, the sections beingconnected together in a novel manner.

A further object of the invention is the provision of a form of thischaracter which is simple in construction, reliable and cilicient inuse, and inexpensive in manufacture.

With these and other objects in view, the invention consists in theconstruction, combination and arrangement of parts as will behereinafter fully described, illustrated in the accompanying drawings,and pointed out in the claims hereunto appended.

In the drawings :Figure 1 is a perspective view of a form constructed inaccordance with the invention, the same being disposed in archformation. Fig. 2 is a similar view looking toward the inner facethereof. Fig. 3 is an end elevation of the form when adjusted incylindrical formation. Fig. 4: is a vertical transverse sectional viewthrough the form when in cylindrical shape. Fig. 5 is a verticallongitudinal sectional view thereof. Fig. 6 is a perspective view of thelocking rod.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the drawing in detail, the form comprises a plurality ofsections A, each being of arched formation and includes companion strips10 and. 11 having in-turned flanges 12 abutting each other at the longersides adjacent each other of the strips. The flanges 12 have passedtherethrough rivets 13 for uniting the strips of each section.

Arranged at opposite ends of the sections A are pivotally connectedlinks 1%, each being formed with a pair of ears 15 which are at rightangles thereto, the ears being disposed against the inner faces of thesections and are connected thereto through the medium of rivets 16 whichare passed through each ear and each strip of the respective sections sothat the links will be permanently fixed thereto. The sections A whenconnected to the links 142 are disposed in overlapping relation to eachother, and by reason of the pivotal connection of the said links thesections can be adjusted to form an arch or a cylinder so that the formcan be used in building culverts, conduits, hollow or cylindrical tiles,cave tops, or the like, the form being readily adjustable for thispurpose.

Provided in'the outermost links 14: of the respective series at each endof the sections A of the form are alining openings 17 in which isreceived a locking pin or rod 18 which is readily detachable therefrom,and this rod or pin when engaged in the open ings will fasten the formin cylindrical shape for the use thereof as a core in making hollowcylindrical tiles.

The flanges 12 reinforce the sections of the form to strengthen the sameand give rigidity thereto. The pivotally connected links permit freeflexibility of the form for changing the contour thereof for use inbuilding different structures.

From the foregoing it is thought that the construction and manner of useof the device will be clearly understood, and therefore a more extendedexplanation has been omitted.

l/Vhat is claimed is 1. A. form of the class described comprising aplurality of arcuate shaped sections disposed in overlapping relation toeach other, a plurality of pivotally connected links mounted at the endsof the sections, each section being formed from two strips, in-turnedflanges formed on the respective strips and abutting each other, andrivets uniting the abutting flanges.

2. A form of the class described comprising a plurality of arcuateshaped sections disposed in overlapping relation to each other, aplurality of pivotally connected links mounted at the ends of thesections,

each section being formed from two strips, in-turneol flanges formed onthe respective strips and abutting each other, rivets unitingthe-abutting flanges, and ears formed on the respective links andriveted to the strips of each section.

3. A form of the class described comprising a plurality of arcuateshaped sections disposed in overlapping relation to each other, aplurality of pivotally connected links mounted at the ends of thesections, each section being formed from two strips,

in-turned flanges formed on the respective strips and abutting eachother, rivets uniting the abutting flanges, ears formed on therespective links and riveted to the strips of each section, and meansfor detachably connecting the end links together to hold the sections incylindrical contour.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

WILLIAM M. SMITH. Witnesses:

EIBEN SHELLHART, DELTA ASHFORD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

